Title: Absorption and Abundances in the Ultracompact Binary 4U 0614+091

Object: 4U 0614-091
Exposure: 80 ks
Lead Scientist: Norbert S. Schulz
[ ] Primary or [ X ] Backup
Constraints (none/easy/average) NONE
[ ] TOO?

Brief description:

We will reobserve this ultracompact binary 4U 0614+091 using HETGS observations
and revisit the K edge variability near Ne K as well as the broad O VIII line.
We will continue to study compositions and structures of inter- and circumstellar 
matter and test the TBNEW absorption model developed for XSPEC from our absorption studies
for O K, Fe L, and Ne K, compare abundances for O II/III and Ne II/III with
the other sample, obtain Ne/O abundance ratio and compare with other binaries,
measure EWs in line absorption from Ne IX, O VIII, O VII ions to characterize 
the hot ISM gas toward the anti-GC region